"Abacab" was on at the grocery store the other day, which made me think of this.
As for something getting dropped, the only song I'd wanna see go is the cocktail lounge version of "Lamb." Be a shame if they lost "Duchess," which is the emotional high point of the show to my ears. They could also use it as the opener and drop "Behind the Lines," which opened the 2007 tour anyway. Then drop "Lamb" and put "Lover's Leap" in the acoustic section.
Yes, I'd be very happy with that. I really, really don't want to see Duchess go, and can't imagine they would. What did they swap out for That's All in the US on a prior tour? Mama maybe? I wouldn't like to see that go either, but there's little I'd be sad about missing if Abacab gets played.
My favorite "oh, there's Abacab playing" story (in the US) involved sitting outside a pub/restaurant with an acquaintance, hanging out because our daughters were on a play-date, and Abacab came on. He lit up, recalling it as a song that was big when he was in college, and it turned out he was a pretty big fan of the band! Needless to say we became more friends than acquaintances (chatting about Genesis over a couple of beers; powerful friend-making elements there!).